Spurgeon in 1876:
People said to me years ago, "You will break your constitution down with preaching ten times a week," and the like. Well, if I have done so, I am glad of it. I would do the same again. If I had fifty constitutions I would rejoice to break them down in the service of the Lord Jesus Christ.—C. H. Spurgeon, cited in The Suffering Letters of C. H. Spurgeon, 7.
You young men that are strong, overcome the wicked one and fight for the Lord while you can. You will never regret having done all that lies in you for our blessed Lord and Master.